EUVD-2026-44266
GHSA-95p8-vgfr-p8pm
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Heap buffer bounds checking
MITRE ATT&CK
1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv2 – Jul 17, 2026
Remote code execution in Microsoft Windows Media Foundation allows an unauthenticated network attacker to run arbitrary code by triggering a heap-based buffer overflow (CWE-122) in the media-processing pipeline, per the CVSS:3.1 vector (AV:N/PR:N/UI:N). The flaw affects a broad range of client and server SKUs from Windows 10 1607 through Windows 11 26H1 and Windows Server 2016 through 2025. Microsoft has released patches; there is no public exploit identified at time of analysis and it is not listed in CISA KEV, with EPSS estimating a modest 0.83% 30-day exploitation probability.
Earlier versions of this analysis (1)
Remote code execution in Microsoft Windows Media Foundation lets an unauthenticated network attacker run arbitrary code on the victim's machine when the target opens or renders a maliciously crafted media file or stream. The flaw is a heap-based buffer overflow (CWE-122) affecting a broad range of Windows client and server releases from Windows 10 1607 through Windows 11 26H1 and Server 2016 through Server 2025. No public exploit identified at time of analysis, but the low complexity and network vector make it a high-priority patch item; exploitation requires user interaction (UI:R).
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 14 packages in euvd
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Network-delivered malicious media (AV:N), no auth needed (PR:N), but the victim must open the file (UI:R); a heap RCE yields full C:H/I:H/A:H within the process (S:U).
Primary rating from Vendor (microsoft).
CVSS VectorNVD
Lifecycle Timeline
4DescriptionNVD
Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to execute code over a network.
Executive ViewAI
CVE-2026-57090 is a critical remote code execution vulnerability in Windows Media Foundation affecting Windows 10 and Windows Server 2016-2025. Unauthenticated network attackers can execute arbitrary code without user interaction, and while no public exploit has been identified, the vulnerability's broad version coverage creates significant enterprise exposure. Immediate patching is required to reduce the risk of potential compromise before weaponized exploits emerge.
Within 24 hours, inventory all Windows 10 (versions 1607-26H1) and Windows Server (2016-2025) systems to identify potentially affected assets across endpoints and infrastructure. Within 7 days, obtain and test Microsoft's released patch in non-production environments and establish a phased deployment plan prioritizing critical servers and high-value business systems. Complete patch deployment across all affected systems within 30 days, with priority systems remediated within the first 14 days.
Apply vendor patch.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
A heap overflow occurs when a program writes data beyond the bounds of a buffer allocated in the heap memory region.
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